Hydraulic stone finishing method

Abstract

The application discloses a hydraulic polishing stone material shaping method, which adopts a stirrer to stir water with fine iron sand to generate hydraulic scouring on the inputted stone material which needs to be shaped and adjusted in water absorption and has a relatively large water absorption, and the stone material is stirred and eroded for a certain time to achieve the effect that the stone material particle shape and water absorption are controllable. The hydraulic polishing stone material shaping method of the application adopts hydraulic erosion on the stone material which needs to be shaped, and no dust and heat are generated, the process is reliable, and the performance parameters of the stone material are controllable by the stirring time. The application solves the problem that the existing stone material shaping method generates a large amount of dust.

Description

Technical Field

[0001] This invention relates to the field of stone shaping technology, specifically to a water-jet polishing stone shaping method. Background Technology

[0002] Currently, stone shaping machines are mainly improved versions of impact crushers. Stone is pushed through a high-speed rotating impeller by centrifugal force, colliding with another portion of material distributed in an umbrella-like pattern around the impeller. This process involves repeated collisions, friction, and crushing between the impeller and the casing to obtain crushed stone with better particle shape and size. However, this method requires significant investment in equipment, generates substantial dust and stone powder, and the uncontrollable surface porosity of the produced stones leads to high water absorption. Polishing machines, on the other hand, use hard, wear-resistant particles to remove surface roughness and increase surface smoothness through high-speed friction, thus reducing porosity and water absorption. However, this process is inefficient, struggles to polish the stone from all angles, generates significant heat, and produces hazardous dust. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, a water-jet polishing stone shaping method is provided to solve the problem of excessive dust generated by existing stone shaping methods.

[0004] To achieve the above objectives, a method for shaping water-polished stone is provided, comprising the following steps:

[0005] Add the stone material to be shaped, water, and fine iron sand into the mixer, and set the mixing linear speed of the mixer to be above 1.2 m / s;

[0006] A mathematical model is constructed to determine the wear time of hydraulic shaping of stone with a preset hardness and the porosity wear rate of the stone. The mathematical model is y = 0.1783ln(x) + 0.5363, where x is the wear time and y is the porosity reduction rate.

[0007] Based on the mathematical model and the designed porosity of the stone to be shaped, the estimated wear time of the stone to be shaped is calculated.

[0008] Based on the hardness of the stone to be shaped and the estimated wear time, the final wear time of the stone to be shaped is determined.

[0009] The mixer is turned on and the final abrasion time is run. The stone to be shaped is abraded and shaped in the mixer by hydraulic and fine iron sand to reduce the porosity and obtain stone with the designed porosity.

[0010] Furthermore, the mixer is a vertical shaft planetary mixer.

[0011] Furthermore, the preset hardness is a Mohs hardness of 3.

[0012] Furthermore, when the Mohs hardness of the stone to be shaped is between 3 and 7, for every 1 increase in the Mohs hardness of the stone to be shaped, the estimated wear time of the stone to be shaped increases by 50%.

[0013] Furthermore, the volume of the stone to be shaped, the water, and the fine iron sand is less than 1 / 3 of the volume of the mixer's hopper.

[0014] Furthermore, the fine iron sand is iron sand of 80 to 200 mesh.

[0015] Furthermore, the density of the fine iron sand is greater than or equal to 4.5 g / mm³. 3 .

[0016] Furthermore, the mass ratio of the stone to be shaped to the water and the fine iron sand is 1:0.5 to 1.5:1.

[0017] The beneficial effects of this invention are as follows: The water-jet polishing stone shaping method of this invention uses a mixer to stir water containing fine iron sand to generate hydraulic scouring of the stone material to be shaped and have a high water absorption rate, subjecting it to stirring and abrasion for a certain period of time, thereby achieving controllable stone particle shape and water absorption rate. The final abrasion time of this invention is customized according to the hardness and surface porosity of the stone. This water-jet polishing stone shaping method of this invention uses hydraulic abrasion of the stone material to be shaped, without generating dust or heat, and the process is reliable. The performance parameters of the stone are controllable by adjusting the stirring time. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the mathematical model of an embodiment of the present invention. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Reference Figure 1As shown, the present invention provides a method for shaping water-polished stone, comprising the following steps:

[0023] S1: Put the stone to be shaped, water and fine iron sand into the mixer, and set the mixing linear speed of the mixer to 1.2m / s or higher.

[0024] The mass ratio of the stone to be shaped to water and fine iron sand is 1:(0.5~1.5):1.

[0025] As a preferred implementation method, the mixer is a vertical shaft planetary mixer.

[0026] After the stone to be shaped, water, and fine iron sand are put into the mixer, the volume of the stone to be shaped, water, and fine iron sand is less than 1 / 3 of the volume of the mixer's hopper.

[0027] The fine iron sand added to the mixer is of 80-200 mesh. The density of the fine iron sand is greater than or equal to 4.5 g / mm³. 3 .

[0028] S2: Construct a mathematical model of the wear time and porosity wear rate of the hydraulic shaping of stone with preset hardness. The mathematical model is y = 0.1783ln(x) + 0.5363, where x is the wear time and y is the porosity reduction rate.

[0029] In this embodiment, the preset hardness is Mohs hardness 3.

[0030] S3: Based on the mathematical model and the design porosity of the stone to be shaped, the estimated wear time of the stone to be shaped is calculated.

[0031] S4: Based on the hardness of the stone to be shaped and the estimated wear time, determine the final wear time of the stone to be shaped.

[0032] Specifically, when determining the final wear time, if the Mohs hardness of the stone to be shaped is between 3 and 7, the estimated wear time of the stone to be shaped increases by 50% for every 1 increase in Mohs hardness.

[0033] S5: Start the mixer and run the final abrasion time. The stone to be shaped is abraded and shaped in the mixer by hydraulic and fine iron sand to reduce the porosity and obtain stone with the designed porosity.

[0034] The water-jet polishing stone shaping method of the present invention uses a vertical shaft planetary mixer to stir water containing fine iron sand to generate water scouring to feed the stone material that needs to be shaped and has a high water absorption rate. The stone material is stirred and eroded for a certain period of time to achieve the effect of controllable stone particle shape and water absorption rate.

[0035] The Mohs hardness of the stone to be shaped is preferably 3 to 7.

[0036] The main parameters of the hydropolishing process are: stirring distance (stirring linear speed × stirring time).

[0037] Taking limestone with a Mohs hardness of 3 as an example, a mathematical model is constructed based on the porosity abrasion rate and stirring time (with a linear velocity of 1.2 m / s as an example) of limestone to predict the abrasion time.

[0038] When the Mohs hardness of the stone is between 3 and 7, the wear time increases by 50% for every 1 increase in Mohs hardness. For example, if the hardness of basalt stone is 5, its wear time should increase by 150% × 150% = 225%, and so on. The final wear time is then determined based on the Mohs hardness of the stone to be shaped and the initial estimated wear time.

[0039] When starting the vertical shaft planetary mixer, the mixing linear speed should be above 1.2 m / s; slower speeds will increase the wear time. The final wear time is customized based on the hardness and surface porosity of the stone. After mixing, the stone and fine iron sand are separated using a sieve. The water absorption rate of the stone is tested, and the product is shipped only after meeting design requirements. The fine iron sand and water can be reused.

[0040] The water-jet polishing stone shaping method of the present invention uses water-jet abrasion on the stone to be shaped, which does not generate dust or heat, and the process is reliable. The performance parameters of the stone can be controlled by the stirring time.

[0041] To further illustrate the water-polished stone shaping method of the present invention, the following embodiments are provided for illustrative purposes.

[0042] Example 1

[0043] The stone to be shaped is recycled limestone crushed stone with a Mohs hardness of 4, a particle size of 5-25 mm, and a surface water absorption rate of 4.3%. The design aims to reduce the porosity of the crushed stone to less than 2%.

[0044] Weigh out 1 part by mass of recycled limestone crushed stone, 0.5 parts by mass of fine iron sand (80-200 mesh), and 1 part by mass of water.

[0045] Place all materials into a mixer with a capacity greater than three times the total amount of materials.

[0046] Start the mixer. The mixer's linear speed is 1.2 m / s. The calculated scouring and abrasion time is 1.24 h. With a hardness increase of 1, the abrasion time should be at least 1.86 h. Here, we take 2 h.

[0047] Magnetic attraction is used to separate and regenerate limestone gravel and fine iron sand, and the fine iron sand is recycled and reused.

[0048] The particle size of the shaped recycled limestone was measured to be 5-25 mm, and the water absorption rate was 1.8%, which met the predetermined requirements.

[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for shaping water-polished stone, characterized in that, Includes the following steps: Add the stone material to be shaped, water, and fine iron sand into the mixer, and set the mixing linear speed of the mixer to be above 1.2 m / s; A mathematical model is constructed to determine the wear time and porosity wear rate of a stone with a preset hardness during hydraulic shaping. The mathematical model is as follows: y = 0.1783ln(x) + 0.5363 ,in, x To wear down time, y The porosity reduction rate; Based on the mathematical model and the designed porosity of the stone to be shaped, the estimated wear time of the stone to be shaped is calculated. Based on the hardness of the stone to be shaped and the estimated wear time, the final wear time of the stone to be shaped is determined. The mixer is turned on and the final abrasion time is run. The stone to be shaped is abraded and shaped in the mixer by hydraulic and fine iron sand to reduce the porosity and obtain stone with the designed porosity. The mass ratio of the stone to be shaped to the water and the fine iron sand is 1:0.5~1.5:

1.

2. The water-polished stone shaping method according to claim 1, characterized in that, The mixer is a vertical shaft planetary mixer.

3. The water-polished stone shaping method according to claim 1, characterized in that, The preset hardness is Mohs hardness 3.

4. The water-polished stone shaping method according to claim 3, characterized in that, When the Mohs hardness of the stone to be shaped is between 3 and 7, for every 1 increase in the Mohs hardness of the stone to be shaped, the estimated wear time of the stone to be shaped increases by 50%.

5. The method for shaping water-polished stone according to claim 1, characterized in that, The volume of the stone to be shaped, the water, and the fine iron sand is less than 1 / 3 of the volume of the hopper of the mixer.

6. The method for shaping water-polished stone according to claim 1, characterized in that, The fine iron sand is iron sand with a mesh size of 80-200.

7. The method for shaping water-polished stone according to claim 6, characterized in that, The fine iron sand has a density of 4.5 g / mm or more 3 .

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